Wheel for a chair base



FIG. 1 is a front, left perspective view of a wheel for a chair base;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a wheel for a chair base, as shown and described. 